TatukGIS Editor - GIS mapping and data editing application with built-in scripting environment and Free viewer
MySQL - The world's most popular open source database
Hexagon Geomedia - GeoMedia, a comprehensive and dynamic GIS software, extracts compelling intelligence from geospatial data to present actionable information.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
QGIS - QGIS is a desktop geographic information system, or GIS.
SQLite - SQLite Home Page